HV (High Voltage) DC (Direct Current) Warning:
Traction Battery Packs, Motors, Chargers, and other HV sources could cause serious injury or death if proper precautions are not taken while working on or around such High Voltage Direct Current sources.

Use this information at your own risk:
There is no warranty expressed nor implied and we are not liable for any of your past, present, nor future actions.
Even should you perform these modifications to the letter you could still damage any number of components in your vehicle causing it to no longer function.
Even if it appears to function properly your actions may cause it to self destruct with collateral damage to surrounding properties other than your vehicle.
By utilizing these ideas and instructions in an attempting to enhance national security, reduce gas consumption, vehicle "emissions", your carbon footprint, or smog, you do so at your own risk & peril.

Warranty:
In performing some of these modifications you may void your warranty with the vehicles manufacturer.

The High Voltage Schematic deals with all the high voltage connections, relays, fuses, and the battery pack itself.

Control Schematic 2f.

Battery Tap Emulator 2g.

High Power Schematic 2d.

Changes from V1 to V2

As part of a Prius conversion to be done over the course of the Inaugural Maker Faire, April 22-23, we will be dramatically improving the documentation of the basic PbA PRIUS+ conversion process. We will also be publishing complete parts and supplier lists and designing prited circuit boards for the electronics, which we will find some way to get produced for sale afterwards. If you live close enough to get there, please join us to observe a real conversion in process.

Version 2f HV board schematic and Jerry's parts list additions. Ron added D11-12 to solve a bug I just fixed on his car. While he was at it, he changed D2 from a 1N4002 to a 1N4003 so that only 1N4003 of that series diodes
is used. Ron found Q3 missing from the parts list, so It was added. We will have to solder D11 and D12 to their associated transistors when stuffing the boards, as the HV board is already in fab based on versions 2e -- our first rework.

Version 2c schematics are now available, some of the changes since Version 1 are:

Add the ability to switch back to the OEM battery pack at will (important for PbA battery packs, which are unreliable at low temperatures. Also handy during the testing process and perhaps to preseve a full charge for demonstration at a destination)

Improve compatability with CAN-View, which will now be the first and recommended Prius PHEV User Interfaces or BMS spoofing and EV-mode automation system (Ron is actively working with Norm, CAN-View's creator, to ensure effective automation algorithms)

Move all high voltage circuitry off the low power control board to the HV battery tap emulator board.